Turret-lathe



F. W. PARSONS.

TURRET LATHE.

APPLICATION FILED IAN. I. 1920.

m. .m 9 L I I I No n Jo @5. R Am m... A I. W M L \//11.....\\..\.O F -IIIIIIIIIII II|IIIIIIIIIIIIIIIIIIIHI m -L M abkwnutd Patented Aug. 9, 1921.

3 SHEETS-SHEET 3.

INVNTR. f7 WFAESUNS.

l i ed out in the claims. .f

To `all whom t may] concern.'

is a plan view of the turret and the slidable Fig. 2 is a vertical sec- 2O tom of the turret( which corresponds to the.v

"UNITED vSTATES FREDERICK W. PARSONS, 0F CLEVELAD, OH'IKO.

TURRET-LATHE.

Be it lrnown that I, FREDERICK at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and style of turret lathe comprised in my application for Letters Patent of the United States, Ser. No. 310,671, and particularly in` means for clampingthe turret firmly on` its base to prevent possible looseness and chat tering while at worlr, allsubstantiallyas shown and described and particularly pointln the accompanying drawings, Figure 1 support therefor. i tional elevation centrally lengthwise through .Fig 1, omitting the operating lever. Fig. 3 is a plan view on a line horizontally throughthe machine onn line `3 3, Fig. 2,' showing oneposition of the parts illustrated therein,v

andlFig l is vasimilar view te Fig. 3but` with the saidparts inthe reverse as hereinafter fully described.-

orimmediate support therefor anda ,portion chain of gears and parts adapted to rotate the turret inonedirection.` Fig. 7 is a cross section through theturret and/ its immediate supports." l A f Having reference, rst, to the features or yparts shown herein corresponding to those found in the. above cited application, we' have the turret 7, the so-called slide vorfslid-v able support 8 'onlwhiehxthe turret is'rotaltably mounted and' vthe saddle-9 adjustably seated on the'fixed bottom or base '2.

The turretand` its immediate support orV slide are adapted to `be moved` backend forthy within limits by the hand lever 10, which is linked vatl-its outer end toa bracket 11 lixed von said saddle and kpivotally,engaged at6 on `said slide.

retired. ya heavy coiledl spring 16 is compressed to store up powerto rotate the tur' vret topredetermined position forwork and* 2 at the same time the taperedlocking bolt 15VV When 4the slideand turret are is withdrawn from'a tapered holein the botposition,.-

specirwamnof rettersratent. Patented Afug '9, 1921,y

Application filed January 7,' 1920. Serial No. 349,926. Y

mitting the saidvspringto act andlrotate the turret through. the medium of the intervening ratchet member 18 and the three several gears 19, 2O and21. The'ratchet mechanism v check pawl 17 Fior. is released thus` erw.l PAR-, b p

sons, a citizen of the United States, residing set to turn thefgears'and turrets releases thei 1 spring lithe instantthat the hook 37 is released fromshoulder 36. `Thisrelease occurs through the pivoted lever 39, which has .an inclinedend projection y4.0 adapted to slip under the beveled end vof pawl 17, and the other end of lever-39carries ythe turret locklng bolt 1 5; The said end ,40, however, as a lirstfrnovement for release of bolt 15 to free the turret, rides up on the incline L1 andbefore it reaches hook member 37 tofset it freer permit the spring to, act, and only partial yrotation ofl ratchetv member 18 is given-,by

link 32 under the impulseof thespring when l pawl17 is released. i' In operation with the `foregoing parts each ini-)vement'ofr the slide 8' by lever 10y away r;

y y i v from the work will first cause the locking .l Fig. 5 is'alongitudinal'vertical section of if theturret saddle so called, andof the slide 30 of the turret. Figv 6is-"a plan view of the bolt 15: to `be `withdrawnfrom theturret;

fective' 1f operating position.v v#Trip lever 39 then releases hook 37kandg=1the spring 16 exl,

pands and frotatesgthefseres of-gears de. scribed and the turret,and stop screwcyl-V finder 53 also -is rotated, Vas hereinafterl dea;Y

scribech Onreversaltof lever 10 thegslide 8 is carried forwardfas. :far as the stop screws 51 will perm-,itandinrthe initial stages of thismovement theturret 'locking bolt 15- is raised into oneojfwthe ,series offholes'in. the f .bottom ofthe turret, thus loclri-ngthe turret against rotationandlalining a corresponding gworlringtool. The stopscrews 51 referred to correspond in *number lto thetools inthe turret,jandall are V,mounted in and extend through the cylinder 53 carried bythe slide y 8 and driven. by the shaft 28 yandV the spiralV .gears'25and 2)?, all `as set forth inthe preceding application above referred to.

Now, Ahaving the lathe] constructed. and

adapted to operateas thus generally outlined, the invention which this application is .designed to cover has `todo morefespecially `with the means rforI clamping the turret tightly upon its seat on the slide 8 so to avoid -any possible looseness and consequent,

lconstruction in itself tends to center the turret on its seat and the locking bolt 15 serves as a3 definite stop against rotation, but neither construction serves the further need `of anti-chattering mechanism. Such mechanism in this instance comprises means for automatically clamping the' turret irmly upon its seat'and for releasing the same to permit rotation, and in this instance conand beneath the same to make clamping and P is fixed upon the bottom ofthe slide 8 by l screws S and spaced apart therefrom by' sists of a clamping bolt 24 extending down through a sleeve or bushing Z) in the axial center of the turret and through the slide 8 other engagements. The head of the` bolt rests upon the flanged top of the said sleeve in a. recess in the turret and a clamping plate spools or the equivalent, to alford roo-in between said plate and the slide for the actuating `gears'20 and 2l. The gear 2O is supportedon a screw-threaded shaft 29 and gear or pinion 2l is mounted and splined on a reduced portion of the sleeve b, as is also the spiral gear 25 next above 2l, and' which is meshed by 'ear 27 on shaft 28. The

clamping plate sleeveV ZJ extends only to said plate while 'f bolt 24 projects through'the Vclampingplate P and has its screw-threaded end engaged by the nut n bearing against lsaid plate-' The j ablyseated in base 9 but directly inthe lineY said nut has a short arm or lever a bywhich the nut is adapted to be rotated to clampingl and releasing positionsalternately and automatically as the vturret carrying slide is moved back and forth. Inthese operations `and assuming thattheturretv is moving' away trom the work, tlie'claniping screw is loos` ened preliminaryto rotation of theturret,

'and' unclamping is effected when the roller' r or equivalent projection on the bottom side of the nut arm a rides into engagement with the inclined wall of a cam c which lis adjustof travel. of said arm and its roller. The

' cam comprises a round head divided centendingbeyond each other 'at opposite ends trally by a cam groove, o-r in other words the cam comprises two upright lugs 4 with' straight inner edges spaced apartV and ex- 4clamping results, and the'cam surfaces may l is of such firmness as to' resist all pressure when the nut n is tightenedk on bolt 24 toclamp the turret on its seat, and

turning movement Vgiven to the rotatable cam `opposite end of the cam groove, see Figs. 3

and 4. As this occurs the nut n is rotated sufficiently to release the clamping pressure of bolt 24 upon the turret, so that it may be freely rotated during a continuing movement of the slide and through the agencies provided. `VVhen the turret is stopped and the slide reversed to advance the new tool to working position the lever a is given a reverse turning movement by cam c as roller 1' passes into the rear end of the cam groove and out of the front end on its way forward with the slide and turret, thereby effecting clamping of the turret upon its seat by a tightening movement of nut n. Only a slight movement is required for effecting be set at approximately 45 degrees to t-he line of movement of turret and slide, or more or less inclination can be given by rotatingthe cam member in rits seat by means o-f a pair of screws l and push pins or bolts g which extend through the side of base 9 into bearing engagement with two vdepending pins i, on the bottom sideof the' cam member, see

Figs. 2and 3. That is to say the nut n may f be tightened more or less by rotary adjustment ofcam c whichl controls vthe degree of turning movement of arm a and thenut, and such adjustment and fixing ofthe cam. member in a predetermined position can be accomplished by turning the screws? d from the outside ofthe saddle. One screwd acts as anadjusting screw and the" other screw d servesas a set screw, and their functionsare alternative dependent npon'the direction of member.

- `In summary, when the turret is. retired the clamping screw is automatically released Vclamping*effect supplements the locking action of bolt lwhich'engages the bottom of the turret and prevents rotation, and `both are automatically obtained by the move'-4 ments of the slide on the saddle. able pitch of threadon the-'bolt may be used toreifect a 'longitudinal movement of the boltwhen the nutV is turnedMor I may utilize other means for obtaining' this move`- ment and a clampingof Vthe turretfautomatically during the travel of the SlidegBroadly considered, the invention comprises co-acting lmechanisms adapted to clamp and unfclamp 'the turret automatically during the intervalof movement of the slid'ebaclr and 125 forth in 'respect to the work. VVhat'I claim is: 1 j

- '1. In Va lathe, a rotatable turret and av support therefor and clamping means; extend ing through said parts adapted to bind the `i30V Any Suit@ 1.15,.

fixed base and a support for the turret slidable on said base. a bolt anda tightening nut thereon adapted to clamp the turret on said support and said nut having a lateral arm with a roller at its end, a rotatable cam member ixed on said base having opposite inclined surfaces with a space between adapted to receive said roller and rotate said nut alternately in opposite directions, adjusting screws to rotate and X said cam member in differentposition, and means to Vmove said turret support back and forth and thus bring said roller into engagement with said inclined surfaces and release and lock said bolt.

3. In a lathe, a turret `adapted to rotate intermittently, a bolt adapted to clamp the turret against rotation, a device located beneath said turret adapted to lock and unlock said bolt, a rotatable cam member adapted to actuate said device, and screw and bolt means adapted to adjust and X said cam member with its cam surfaces in diierent working positions relative to said device.

et. In a lathe, a turret, and means adapted to automatically clamp the turret in an immovable position, comprising arotatable cani and a pair of adjusting set screws adapted to iix said cam in different positions.

5. In a lathe, aslide and 'a saddle therefor, a turret mounted upon said slide, a

clamping device Jfor said turret at the bottom of said slide, a movable cam member mounted upon said saddle adapted to be engaged by said device, and means operable from the outside of the saddle adapted to adjust and fix said member in different working positions.

6. In a lathe, a slide, a turret mounted to rotate upon said slide, gears Within said slide adapted to rotate said turret, a clamping plate beneath said gears, a clamping 'bolt extending through said turret and gears and said plate, a tightening device for said bolt bearing against the bottom side of said plate, and stationary means adapted to be engaged by said device in the movements of the slide.

Signed at Cleveland, in the county of Cuyahoga, and State o'Ohio, this 28th day Yof October, 1919. i.

n FREDERICK W. PARSONS. 

